Defiberizing machine



DEFIBERIZING MACHINE Filed Jan. 20. 1931 l atente d Nov. 8, 1 932 EDWARDr. conco'naiv AND WALTER B. HADLEY, or onrcneo, ILLrnoIs, nssrenoa's T 7JOHN nnnnnoee, or CHICAGO, rumors r DEFIBERIZING MACHINE Applicationfiled January 20, 1931. Serial No.i510,051

This invention relates to improvements in defiberizing machines,particularly in ma chines for defiberizing wood for use in making paper.

The main object of this invention is to provide means for adjusting theposition of the defiberizer brushes in an efiicient and dependablemanner.

Machines of the type herein referred to usually comprise a table, a pairof brushes mounted on shafts extending transversely of the machine,under the table, and means for driving the shafts in oppositedirections. The table h as an opening located above each brush,extending through the table top from approximately one side margin tothe other, each of said openings being wide enough to permit the tips ofthe brush needles to extend into the opening and to engage the materialto be defiberized, which is piled on the table and supported thereon soas to extend across the openings. The material to be vdeiiberized isheld in an open bottom hopper which is adapted to be moved back andforth on the table and carries the material with it across the openings.

In using machines of the character described, considerable trouble hasbeen experienced in retaining the brushes in adjusted position forefiicient engagement with the material to be defiberized. On account ofthe speed of operation of the machine, considerable vibration is set upand it has been noted that by reason of the brushes moving out ofadjusted position, the production of defiberized material issubstantially lessened within about thirty minutes after adjustment.

The object of the present invention is to remedy this difiiculty and toproduce a machine eflicient for its intended purpose.

In the drawing Fig. 1 is a side elevation, partly in section, of adefiberizing machine embodying our invention.

Fig. 2 is a plan view of the brush adjusting means, which is the subjectof this invention.

Fig. 3 is an enlarged side elevation of the "adjusting means.

In that embodiment of the invention shown in the drawing, indicates thebase of the machine, 11 the frame, 12 the table or horizontal support,13 a hopper adapted to be moved back and forth on the table, 14 therails or guides on which the hopper wheels 15 travel, and 16 anysuitable means (not fully shown) for reciprocating the hopper.

Under thetable are two brushs'hafts 17 mounted in brush bearing housings18. The brush needles are indicated at 19 and a motor for driving thebrushes, at 20.

The table 12 is provided with rectangularly shaped openings 21 locatedabove the brushes 19. The material to be defiberized isplaced in thehopper on top of the table 12, to extend across the openings 21 inposition to be engaged by the tips of the brush needles 19.

The brush housing 18 is provided with a lateral car 22 apertured toreceive the pivot pin or bolt 23 which secures the housing to theupright support 24. Directly opposite the ear 22 the housing 18 isprovided with a slotted ear 25 through which a bolt 26 extends into afixed part'of the frame work such as the depending boss 27. Upper andlower screw bolts 28, 29, eXtend' through the ear 25 and engage the bolt26 at opposite sides. Nuts 30, 31 on the bolts 28, 29, respectively,engage the ear 25 on its upper and lower edges. By turning the nut 31 onthe bolt 29 and the nut 30 on the bolt 28, the brush bearing housing 18may be raised or lowered about the pivotal connection 23..

' It has been found that adjusting means of the type described cannot bedepended upon to retain the brushes in adjusted positionfor anysubstantial period of time. In the operation of the machine, thefriction on the brushneedles as well as the normal vibration of theparts, due to the speed of operation, causes the brushes to slipdownwardly about their pivotal mountings with the result that productionis retarded. For this reason we have provided an attachment which may beinstalled in conventional machines. It comprises a side bar 32,-preferably in the form an angle bar, having downturned ends 33 rivetedor otherwise secured to the upright standards 24. The upper surface ofthe bar 32 islocated adjacent the lower sur face of thebrushbearing-housing 18. Ad-

its

jacent one of the supports 24 and slightly above the top of the bar 32,fixed to the frame 11, is an L-shaped bracket comprising plates 34; and35. The plate 35 is apertured to receive a wedge member 36 which has aflat bottom surface adapted to rest on the bar 32 and an inclined ortapered wedge upper surface 37. Opposite the tapered end the wedge isscrew threaded as indicated at 38.

The standard 24: is apertured in horizontal alignment with plate 35 toaccommodate the wedge which extends therethrough. Lock nuts 39 and 40,on the screw threaded part of the wedge, hold it in adjusted positionrelatively to the bracket plate35. If desired the horizontal bar 32 anda member extending at right angles thereto, such as the bracket plate35, may be made integral and secured to a fixed part of the machine.

The wedge 36 may be of any desired size to suit the machine with whichit is to be used, but usually a wedge 1%, thick, tapering down to inthickness is sufficient for its intended purpose. After the wedge hasbeen placed into the desired position under the brush bearing housing soas to bring the brush needles into proper engagement with the materialto be defiberized, the lock nuts 39 and 40 are tightened to retain it inadjusted position.

When the adjusting means of the present invention is installed in aconventional machine of the type herein shown, the adjusting meansconsisting of the parts numbered 25 to 31 inclusive may be dispensedwith, or if desired, may be used in addition to the adj usting means ofthe present invention.

The supporting means for the wedge may be installed at each side of themachine and wedge members may be used at one or both ends of each brush.The look nuts cooperating'with the wedge member and part of the fixedsupport have been found a convenient means for retaining the wedge inadjusted position, but obviously other means such as apertures in thewedge end and cotter pins associated therewith, may be substituted forthe construction herein shown.

Changes may be made in details of construction without departing fromthe scope of my invention and I do not intend to be limited to the exactform shown and described except as set forth in the appended claims.

We claim- 1. A defiberizing machine comprising a table, upright supportsfor the table, a brush bearing housing pivotally mounted on the uprightsupports, a brush having a shaft 'rotatably mounted in the housing, andmeans for adjusting the position of the housing relatively to the table,said means comprising a cross bar secured to the upright supports,anapertured bracket secured to a fixed part the aperture in the bracket7 of the machine, a wedge member movable on said cross bar contactingthe brush bearing housing and means on the wedge member cooperating withthe bracket for retaining the wedge in adjusted position.

2. A defiberizing machine comprising a table, upright supports for thetable, a brush bearing housing pivotally mounted on the uprightsupports, a brush having a shaft rotatably mounted in the housing, andmeans for adjusting the position of the housing relatively to the table,said means comprising' a crossbar secured to the upright supports, anapertured bracket secured to a fixed part of the machine, a wedge membermovable on said cross bar, contacting the brush bearinghousing and meanson the wedge member cooperating with the bracket for retaining the wedgein adjusted position, said last mentioned means consisting of screwthreads on the end of the wedge memher and lock nuts on the screwthreaded end, one at each side of the bracket.

3. An adjusting attachment for a pivoted brush bearing housing of adefiberizing machine, comprising a cross bar adapted for attachment to afixed part of the machine, an apertured piece extending at right anglesto the cross bar, a wedge member contacting the housing movable on thebar, and having one end extending through the apertured piece and meanscooperating with said apertured piece to retain the wedge member inadjusted position on the cross bar.

In testimony, that we claim the foregoing as our invention, we afiix oursignatures, this 16th day of January, 1931.

1 EDWQ P. CORCORAN.

WALTER- B. HADLEY.

